May your character preach more loudly than you words. Who you are and your values have the ability to influence others and the world. Actions speak louder than words so therefore who you are speaks louder than what you have to say.
You will never truly understand the struggles of another person. Remember to realize how hard your own struggles are for you. The other guy feels the same way. We are all trying to make our way in this world so make it easy on everyone and don't judge.